Page 49 - Build Your Own Transistor Radios a Hobbyists Guide to High-Performance and Low-Powered Radio Circuits

FIGURE 3-15 Film-dielectric capacitors.

The markings on many frlm capacitors are done in two ways. One is in microfarads.
Thus the capacitor at the top of the figure is marked ".010," meaning 0.01 IJF. The
capacitors at the bottom of the figure are usually marked with a three-digit code in
picofarads (pF), with the third digit denoting the number of zeros following the first
two digits. For example, "102" means 10 plus two zeros after 10 = 1,000 pF or

0.001 IJF.
Ceramic, mica, and film capacitors can be connected with the leads either way. But
common electrolytic capacitors are polarized and thus are notthe type of capacitors
that can have leads switched without a problem. The schematic diagram will point
out how the electrolytic capacitors should be connected. See the electrolytic

capacitors in Figure 3-16, where the markings indicate negative or (-).